Toxic air pollutants are poisonous substances in the air that come from natural sources (for example, radon gas coming up from the ground) or from manmade sources (for example, chemical compounds given off by factory smokestacks) and can harm the environment or your health.
Subsequently, Scorpius X-1 was discovered in 1962 by a team, under Riccardo Giacconi, who launched an Aerobee 150 sounding rocket carrying a highly sensitive soft X-ray detector designed by Frank Paolini.
Sodium was discovered by Sir Humphrey Davy in England in 1807. He  discovered that he could separate out the sodium from compounds by  using electricity.otassium was discovered by Sir Humphrey Davy in 1807 Lithium was discovered by Johan August Arfvedson in 1817 Sodium was discovered by Sir Humphrey Davy in 1807. 6 people found this useful.